Sony HT-DDW660 Service Manual page 33

44 43
LED1
1
LED2 2
3
LED3
LED4
4
OSC
5 OSC
DOUT
6
DIN
7
Serial
interface
CLK
8
STB
9
KEY1
10
KEY2 11
12 13
IC100 PT6315 (DISPLAY BOARD)
42 41 40 39
Grid driver
Command decoder
Display memory
24 bits x 12 words
Timing generator
key scan
Key data memory
(2 x 16 bits)
14 15
IC101 TC74ACT08P (DISPLAY BOARD)
1A
1
1B
2
1Y 3
2A 4
2B 5
2Y 6
GND 7
38 37 36 35 34
Multiplexed driver
segment driver
16 17 18 19 20 21 22
VCC
14
13 4B
4A
12
11
4Y
10 3B
3A
9
8 3Y
STR-K660P
SEG19/GRID10
33
32
SEG18/GRID11
31 SEG17/GRID12
30 VEE
SEG16/KS16
29
28 SEG15/KS15
27 SEG14/KS14
SEG13/KS13
26
SEG12/KS12
25
SEG11/KS11
24
SEG10/KS10
23
27